What has been the problem with the airlayering? I´m planning an airlayer this
spring on a basic A palmatum.

Pauline Muth told me the main problem is that it might take two years to root,
so the first winter you have to put it in a location which is cool enough to
support dormancy, but never goes below freezing. Do you have room in your
refrigerator?
Iris,
Central NY, Zone 5a, Sunset Zone 40
"When you come to a fork in the road, take it." Yogi Berra